Jack hoist



Jan. 18, 1949. H C, DELPH 2,459,505

JACK HOIST v Filed March 6,1946 2 Sheets-Sheet 1 Hu/Kq M CLYDE 175/. PH

Patented Jan. 18, 1949 UNITED STATES PATENT OFFICE JACK HOIST Huram Clyde Delph, London, Ky. Application March 6, 1946, Serial No. 652,280

7 Claims. 1

This invention relates to a jack hoist and more particularly has reference to a device especially adapted to elevate timbers for use in roofing the tunnels of mines and the like. i

The primary object of the invention is the provision of a jack hoist which is functionally and structurally adapted for use in mine tunnels and other low roofed locations.

An important object of the invention is the provision of a hoist having simple and reliable means for supporting and retaining a timber in its elevated position.

, A further important object of the invention is the provision of means for assisting in positioning a timber upon the elevating mechanism.

A still further object of the invention is the provision of a hoist which is adjustable to tunnels of varying heights and clearance.

An additional object of the invention is the provision of a hoist having self-locking means for maintaining the hoist in extended position.

Another object of the invention is the provision of a hoist with simple anchoring means for securing its upper end in position with facility and. safety.

Another object of the invention is the provision of a hoist having a detachable base for convenience in transportation and assembly.

Another object of the invention is the provision of a demountable hoist havin novel and efficient bracing means.

Another additional object of the invention is the provision of a hoistwhose detachable base member possesses other utility in mines and the like.

These together with sundry other important objects of the invention which will become apparent as the following description proceeds, are attained by my invention, one embodiment of which has been illustrated by way of example in the attached drawings, wherein:

Figure l is a vertical elevation, partly in section showing the invention in operative position;

Figure 2 is a horizontal sectional view taken upon the line 22 of Figure 1 and looking in the direction of the arrows;

Figure 3 is a top plan view of the lower base member;

Figure 4 is a vertical sectional view through the base member, being taken substantially on the line 44 of Figure 5 and looking in the direction of the arrows;

Figure 5 is a horizontal sectionalvlew on the line 5-5 of Figure 1;

Figure 6 is a detail showing in vertical section the latching means for the extensible standard;

wherein there is illustrated the jack hoist consisting of a hoist member denoted generally at 10, mounted in a base l2 and extending in operative position in a tunnel between the roof portion M and the floor portion 16.

The base member [2 as now completely illustrated in Figure 4, comprises a frusto-conical lower base member 18 of hollow construction having an open lower end and perforated with series of spaced apertures for apurpose which will be later apparent, and closed at its upper end by an integral centrally depressed, socket portion 22.

Supportedin the socket portion 22 is the correspondingly shaped extremity of an upper base member 24, comprising an inverted, hollow, frusto-conical member, having an upwardly extending flange 26 and a pair of oppositely disposed, diametrical notches or slots 28 for a purpose to be set forth hereinafter. The notches may be formed in enlarged bosses 30 integral with the wall portion as shown in Figures 2 and 3. The two base members are preferably intended to have rigid engagement with each other, any suitable fastening means being employed, but in some instances may be formed as detachable elements, frictionally engaged.

The upper and lower base members may be formed of any suitable material and of any desired construction, attention being directed to their convenient manufacture by casting, stamping, molding and the like.

Rigidly but detachably secured upon the flange 26, as by angle plates or brackets 32 and bolts 34 are a pair of standards 35 which are preferably U-shaped channel members, provided with a series of notches or serrations 38 at their upper ends, and a second series of notches 40 throughout their length. One of the standards 36 is formed, adjacent the base, with a pivot or pin 42 to which is pivoted the upper portion 44 of the standard. As shown generally at 46, the upper portion is adapted to swing about the pivot 42 for a purpose to be later set forth.

J ournaled in any suitable manner in the upper member 48 of the pivotal standard 36, is a pulley 58, preferably of the self-locking type, over which is entrained a cable 60, having its free end disposed for manipulation by the operator, and extending downwardly inside member 48, thence downwardly through the channel in member 38, thence upwardly within members 36 and d8 of the fixed standard to a fixed anchorage 52 adiacent the top plate of the fixed standard.

Slidable vertically upon standards it and 48 is a cage 5d having suitable adjustable locking means 65 cooperative with the notches t!) to secure the cage in selective vertical position upon the standards. Extending transversely of the cage and between the two standards 35, is an axle 68 upon which is freely journaled an elevating pulley 70, supporting the cage. Secured to upstanding lugs 72 upon the cage member are parallel pairs of crossed bars 74, secured together by pins 7-5. The bars are connected by integral end portions 80, providing a rigid cradle structure. The pulley l0 rests upon the loop of the cable 00 as is usual in the art.

The operation of the device will now be evident from the foregoing. The jack is assembled in a selected location, the member 432 of the fixed standard being journaled against the roof until its anchor point 54 becomes embedded therein; thereby fixedly positioning the hoist. If desired the anchor point may be rotated by a suitable tool inserted into aperture 55 to more firmly imbed the point in the roof. The pivotal standard 36 is now swung down into the open position, shown by dotted lines in Figure 1, and a timber or like roofing support rolled up the inclined surface of the standard and positioned upon the cross-arms of the cradle in its lowered position. The pivotal standard is now raised and its telescoping upper member extended until its anchor point is similarly embedded in the roof. Manipulation of the cable 60 will now elevate the timber to the desired height and position where it is releasably retained by the self-locking pulley 58, the latch means, 65, 40 or both, and as the ends thereof will extend considerably beyond the confines of the jack, access is available for placing supports under the ends of the timber. When the timber is secured, the cradle and cage are lowered, the anchor points retracted, the pivoted member swung open and the standards detached from the base for removal of the device.

Although I have not shown an operating means for manipulating the cable 60 it will b-e understood that an electric motor mounted in the base or any other suitable power means may be emp-loyed for this purpose.

Additional reinforcing means are provided for the device whenever needed. These means consist of a member or members 82 having at one extremity an inturned hook portion 84 engage-' able selectively in one of the apertures 29 and the opposite extremity terminating in an angularly disposed wedge or plate 86 adapted to abut the ground, engage under a steel rail or tie in a mine, etc., for bracing the base l2 against tilting or sliding. Stay members 85 may be further operatively employed to steady the upper members and having their extremities respectively engaging recesses or apertures in the members G8 and 82.

Alternatively to its use as a base, member 52 is useful as an abutment or stop for mine cars. In this use as a safety device, a timber is dropped across or into the slot 28 with its end disposed across the path of an escaped or runaway mine car. As will be understood, the lower end or" the timber will pass under the car and the inclined timber will wedge under and stop further movement of the car.

What I claim is:

i. A jack hoist comprising a base, a pair of standards detachably secured to said base, a pivotal section on one of said standards, a cradle slidable between said standards and means carried by said standards for elevating and lowering said cradle, said means comprising a pulley on said cradle, a pulley on said pivotal standard, an anchorage on said fixed standard, and a cable operatively connected to said pulleys and terminating on said anchorage.

2. A jack hoist comprising a base, a pair of standards detachably secured to said base, a pivotal section on one of said standards, a cradle slidable between said standards and means carried by said standards for elevating and lowering said cradle, said standards consisting of telescoping upper and lower members, and means for I adjustably and selectively securing said telescoping members in predetermined position and adjustable locking means on the upper end of said telescoping members for adjustably anchoring said standards in position.

3. A jack hoist comprising a base, a pair of standards detachably secured to said base, a pivotal section on one of said standards, a cradle slidable between said standards, means carried by said standards for elevating and lowering said cradle, a. carriage supporting said cradle and slidably embracing said standards and means on said carriage and directly engaging said standards adjustably locking said carriage in predetermined elevated position upon said standards.

4. A base member for lack h ists comprising a lower frusto-conical member with a central socket portion and a series of spaced apertures in the side, an inverted frusto-conical upper base member seated in said socket portion and means on said upper base member to engage a work to be hoist-ed.

5. A jack hoist comprising a base, a pair of standards detachably secured tosaid base, a pivotal section on one of said standards, a cradle carried by said standards, said cradle including a cage, lugs secured to said cage, a pair of cross-ed bars secured to said lugs, and a pulley supported by said cage.

6. The combination of claim 5, including sup porting means comprising a. transverse shaft extending through said pulley and bolted to obposite sides of said cradle.

7. The combination of claim 5, wherein said cradle includes adjustable locking means cooperating with said standards.

HURAM CLYDE DELPl-l.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 70,565 Higdon Nov. 5, 1867 275,770 Jordan Apr. 10, 1883 433,266 Atwood July 29, 1890 723,434 Arsneau Mar. 24, 1903 742,437 Hunter .a Oct. 27, 1903 926,925 Carmony July 6, 1909 1,034,844 Smith Aug. 6, 1912 1,443,405 Weyerman Jan. 30, 1923 2,288,097 Lucker' June 30, 1942 

